Concise, enantiospecific synthesis of (3S,4R)-3-amino-4-ethylpiperidine as partner to a non-fluoroquinolone nucleus
作者:Michael Reilly、Donald R. Anthony、Corey Gallagher
DOI:10.1016/s0040-4039(03)00421-0
日期:2003.3
An enantiospecific, eight-step synthesis of (3S,4R)-3-amino-4-ethylpiperidine 3 starting from readily available (S)-(−)-α-methyl-4-pyridinemethanol 6 has been achieved utilizing an Overman rearrangement of a chiral allylic trichloroacetimidate 13 as the key step. A diastereoselective hydrogenation of the resulting chiral allylic amine 15 afforded predominantly the desired trans-substituted piperidine
利用Overman可以从容易获得的(S)-(-)-α-甲基-4-吡啶甲醇6开始对映体特异性的八步合成(3 S,4 R)-3-氨基-4-乙基哌啶3手性烯丙基三氯乙酰亚胺酸酯13的重排是关键步骤。所得手性烯丙基胺15的非对映选择性氢化主要得到所需的反式取代的哌啶。哌啶的构象以及氨基官能团的定向性质与观察到的选择性有关。